Denison is located in Grayson County. About 23,957 people live here. Between 2010 and 2020, the population grew from 22,682 to 24,479. The region is at 222 meters above sea level. The area covers about 60.8 square kilometers. There are about 1.159 streets in Denison. The region was founded in 1872. The postal codes are 75020–75021. The dialing code is 903. Denison is city in Grayson County, Texas, United States. Among other things, Denison has hotels, restaurants, clothing Stores, museums, schools, dentists and pharmacies. More information at
www.cityofdenison.com.